Study On The Evaluation Of The Cultivated Land Quality In Shunchang County

Based on results of the agricultural land gradation updated in Shunchang County in Fujian Province, cultivated land (including paddy fields, a dry land and irrigable land) was took as the research object, theoretical analysis method,Analytic hierarchy process method andContrast method were carried out in our study. The article mainly has done more in-depth research in cultivated land grade,evaluation middle results,cultivated land natural quality,cultivated land utilization level,the relationship between standard food production and natural quality index and use index. The following is the main research contents and the results in this dissertation.1) In accordance with the statistics of land resource evaluation research situation in China, the research of agricultural land (cultivated land) quality evaluation has caused people to take seriously. The research of cultivated land quality evaluation has practical significance and application value.2) The article adopts grading methods to evaluate the quality of farmland resources in Shunchang County and corrects land economy coefficients to raise the rationality of cultivated land quality evaluation results. After evaluating, cultivated land mainly is three and four grade, thant is to say the middle farmland is more.3) The cultivated land natural quality and use level were analyzed by mathematical statistical method and ArcGIS software. the overall cultivated land natural quality land in Shunchang County is the medium level, paddy field and dryland natural quality and use level are large difference every town; Cultivated land utilization level is middle rdi level, the difference of cultivated land use level is remarkable in different towns.4) Compared to the overall quality of cultivated land condition between 2009 and 2000 in Shunchang County, it is concluded that area of the second and third grade land is reduced and area of the fourth and fifth land is increased in 2009. This is due to cultivated land investment increase during nearly 10 years, making the soil fertility enhancement and the quality of cultivated land relative improved; This paper the total dry land are the first grade and the quality are the worst, because the irrigation conditions of dry land are the worst, the irrigation assurance score are the lowest, while the drainage condition which is not the cultivated land evaluation factors is the best, causing the total of dry land quality is the worst.5) Analyzed cultivated land in elevations and slope, it got that the elevation of cultivated land was lower and the grade was higher, the quality was most excellent whereas the quality of cultivated land was bad, altitude deviations has an important influence on cultivated land quality; the slope of cultivated land is smaller, the grade of natural quality is higher,the quality of cultivated land is better. Instead, the slope of cultivated land is bigger, the grade of natural quality is lower, the quality of cultivated land is poorer.6) The natural quality index and use index respectively fitted with the standard grain output by spssl6 software. The relevance between the natural quality index of paddy land and dry land and actual standard grain output is very strong in Hilly region, correlation coefficient is 0.838 and 0.809 respectively; The relevance between the natural quality index of paddy land and dry land and actual standard grain output is very low in Mountain basin region, correlation coefficient is0.298 and 0.226 respectively; Assuming that the quality of cultivated land natural in mountain basin region is same, the relevance between the use level index of paddy land and dry land and actual standard grain output is very strong correlation coefficient 0.804 and 0.833 respectively.7)According to the actual situation in Shunchang County, it proposes the measures to realize the sustainable utilization of cultivated land and grain safety counter.